When Joe "the lonely long distance champion runner" shows up at a Saturday morning marathon race where there are $3,000$ other racers or competitors, he knows from experience that all of them are competing for second place behind him. If he knows he will win, despite the presence of competitors, identify the particular nature of his competitive environment. Summary: While there are competitors, Joe clearly has a differential advantage and is out ahead of the pack.

Group of answer choices

pure monopoly $($Joe is really the only runner in the race$)$

pure competition $($hey$,$ there are $3001$ runners in the race and it is wide open as to the winner is$.$ Even Dr$.$ Frye could win it$!)$

monopolistic competition $($through training and self$-$discipline, Joe has created a clear differential advantage that literally distances himself from the competition$).$

None of the above

oligopoly $($there are only a few real runners in the race$)$